Installation
without a workshop
flexibly
powered via USB
LTE & GPS location tracking incl. SIM card, no subscription
Alarm system activates automatically

Interior monitoring for retrofitting

Weitere Farben
sonsor mobil - alarm system
€500,00 Preis inkl. MwSt
Buy nowAccessories

sonsor key fob
€29,00 Preis inkl. MwSt
Buy nowFully integrated mobile alarm system
So small - and everything inside.
Innovation from Germany
The sonsor alarm system combines an impressive amount of technology in a compact housing. LTE, GPS, radar, and various sensors for movement, noise, and climate are fully integrated.
Hard to believe: this small sonsor device holds all of the intelligent monitoring technology.
sonsor alarm system
Automatic activation
completely effortless
sonsor makes it easy for you: the alarm system for your camper switches itself on and off automatically, with no app and no manual operation. When you move away from the vehicle with your key fob, the system is activated; when you approach again, it is deactivated automatically.
Key fob for the family
Motorhome break-in monitoring
instantly informed by push
sonsor detects movement in the motorhome as well as vibrations, changes in light, and sudden noises. This sensor data is intelligently combined to reliably detect break-in or vandalism. In the event of an alarm, sonsor immediately sends a notification to your app.
Optionally, sonsor can indicate by flashing or a signal tone that an intruder has been detected, an effective deterrent before greater damage occurs. This keeps your vehicle protected even when you are not on site.
Multi-sensor monitoring
Live mode from the camper
Alternative to the camera with lots of information
After an alarm, you can start the live mode (the sensor camera) and check directly whether a break-in is really taking place. Instead of a video image, sonsor shows you the sensor data live and clearly (movement, noise, vibration, and brightness) as a time curve and current values. This gives you a clear picture of the situation in seconds, lets you rule out false alarms and react in a targeted way, all without camera recording and with full protection of your privacy.
Insight with sensor camera
Perimeter protection for the night
Sleep safely in the camper
With perimeter protection, sonsor focuses exclusively on the outer shell of your vehicle. For this, the internal sensors are deactivated and only the connected door and window contacts are monitored. This way you can move freely inside the vehicle at night without triggering an alarm.
However, if a door or window is opened from the outside, sonsor detects this immediately and alerts you directly via the app. Optionally, a siren or other alarm functions can also be activated. This makes perimeter protection ideal for the night, when you sleep in the camper and still want to be reliably protected against unauthorized entry.
Protection with door & window contacts
Motorhome GPS location tracking
Where is my camper?
With sonsor, you know at any time where your camper or motorhome is. The integrated GPS in combination with cellular reliably shows you your vehicle's location in the app, ideal on large campgrounds, during longer periods of standing, or while traveling. When you park your camper, a current position is sent every day.
GPS location monitoring instead of live tracking
sonsor is not a GPS live tracker with permanent position transmission. The focus is on break-in protection and theft detection. In the event of an alarm, you quickly receive the current position of your vehicle and can assess the situation in a targeted way.
You'll find your camper
Where is the best place to mount sonsor in my camper?
Place your sonsor in a central spot in your camper or caravan that has a good “overview” of the interior, e.g. opposite the door or on the ceiling. Make sure the front of the device is not covered. Your sonsor additional siren can also be installed a little more hidden, such as in the trunk or the rear part of the camper. The door and window contacts can be attached to all doors and windows, but also to the roof hatch or the service flap.

Sensors deliver indoor climate data
Humidity in the motorhome
perfect climate without mold
sonsor continuously measures the humidity in your camper and warns you in good time when mold formation is a risk, especially during longer periods of standing or in winter storage. This keeps the indoor climate pleasant and your vehicle protected in the long term.
Warns you of critical humidity
Check air quality
for healthy sleep and fresh air
sonsor continuously monitors the air quality in your camper and informs you when it should be ventilated or when the indoor air gets worse. The measured values are based on the detection of hydrocarbons and the calculation of a CO₂ equivalent. This way you always ensure fresh air and a healthy indoor climate, especially important when sleeping in closed vehicles.
Notifies you when you should ventilate
Temperature at a glance
Protection in heat and cold
The integrated temperature sensor in sonsor continuously measures the ambient temperature and warns you of critical values. If it gets too hot in the vehicle, you receive a notification in good time – ideal for protecting your dog or sensitive items. If the temperature drops sharply, sonsor reminds you in good time to drain the water or winterize the vehicle. This way you stay prepared – in any weather.
Is it too hot or cold?
Check battery voltage
Monitoring when free camping
With the additional function of the sonsor alarm siren, the charge level of the vehicle battery can be monitored. The battery monitor is part of the siren and can be individually activated and configured in the accessory settings. This way you always know how much energy is still available – and can make optimal use of your house battery to stay off-grid as long as possible.
Information on charge level
Where sonsor is watching right now
This heatmap shows where sonsor is currently in use. Each dot stands for one or more active systems, for example in campers, vacation homes, or other properties. This gives you an overview of where sonsor is already being used. (As of August 2026)

LTE, GPS, sensors - all built directly into sonsor
Everything in view – you are informed in the sonsor app
No camera, no risk – your data stays private
FAQ
Still have questions? Here you'll find the most common answers.
sonsor can be powered in four different ways.
- With the included power adapter and cable, you can connect your sonsor directly to a 230V outlet.
- If you have a USB-C output available, you can also run your sonsor from it with the included cable. (This includes power banks, but make sure the power bank's trickle-charge mode can be switched off. sonsor uses so little power that power banks sometimes switch off on their own.)
- If you want to be on the safe side, you can also run your sonsor from an outlet with a power bank connected in between. If the mains power fails, the power bank takes over and gives you a buffer until the mains voltage is restored.
- If you own a sonsor connect or a sonsor connect+ for concealed installation, you can also connect them directly to the 12V supply voltage of a house or vehicle battery.
You can find the range of accessories for the sonsor alarm system
in our shop under “Accessories”. We are constantly working on
expanding the sonsor system with useful accessories. Do you have an idea for a
useful accessory and can't find it in our shop? Then
just contact us directly and we will add it for you!
The SIM card in your sonsor with mobile data connection guarantees you 5 years of reception. After that, we can reactivate the SIM card for you. However, we cannot predict what this will cost in 5 years. For this reason, you have the option to purchase the product “Cellular Lifetime – one-time for sonsor”. With it, we automatically take care of renewing the data contract of your sonsor.
Please note that “Cellular Lifetime” applies per sonsor device and is therefore tied to its serial number.
Map
If you need to leave your pets in the car for a short time, sonsor keeps watch for you. Threshold alarms for temperature and volume show you in good time if something is not right, so you can react right away.
sonsor looks after you while you sleep. Depending on your nighttime security needs and the positioning of your sonsor system, you can choose between two reliable monitoring options:
With interior monitoring, sonsor detects movement or unusual activity in your vehicle or property.
Alternatively, “perimeter protection” with door and window contacts provides protection by reporting unauthorized opening immediately.
Whichever option you choose, the sonsor app alerts you about critical incidents even in “Do not disturb” mode. This way you are always safe, even while asleep.
Break-in detection through interior monitoring is only
possible with the sonsor mobil and sonsor home models. It works via four
individually adjustable sensors.
- Movement
- Vibration
- Noise
- Light
sonsor uses the measured values of these sensors to calculate an
activity probability. If this value exceeds a
threshold, you immediately receive an alarm via the sonsor app on your phone.
Depending on the location, you can adjust the sensitivity and range
of the sensors to adapt your sonsor alarm system to your individual
location.
In the sonsor app, you can individually adjust the settings of the sensors used to detect a break-in.
You can also expand the system with suitable accessories to detect break-in attempts via windows and doors even more precisely.
Break-in detection through perimeter protection is possible with all sonsor models. In combination with the sonsor door and window contacts, the opening of doors or windows can be detected. If these are integrated into break-in detection, opening one immediately triggers a break-in alarm.
No, sonsor is an indoor device and is therefore not weather-resistant. However, it is robustly built and can also withstand a light fall or vibrations.
For optimal and reliable use, we recommend mounting the device firmly and placing it free-standing. This way your sonsor is ideally positioned and “looks into the room”.
With the sonsor air quality measurement, you see directly how heavily the air in your property is polluted and, if you wish, you are warned directly when it is time to ventilate. To measure air quality, sonsor detects volatile organic compounds (VOCs). These gases are ideal indicators of air pollution, unusual gases and odors, and the growth of bacteria. To detect gases such as propane or butane as well as carbon monoxide (CO), you can expand your alarm system with the sonsor gas detector.
For the battery monitor function of the sonsor system to be used, the alarm siren & battery monitor device must be connected directly to the power source to be monitored (12 V). Use the connection terminal on the back of the alarm siren for this.
The integrated battery monitor function measures the applied voltage and estimates the current state of charge from it. It is not meant as a precise measuring instrument, but as a practical addition to keep an eye on the general condition of the battery.
The smallest voltage changes are evaluated in combination with the battery type information to determine the approximate charge level. Deviations from other display instruments are possible, because many battery systems internally use a so-called offset to avoid deep discharge.
The estimated battery level is shown to you in the sonsor app. Simply activate the battery monitor tile in your dashboard and keep an eye on your system's power supply at any time.
The sonsor alarm siren was developed as an acoustic deterrent to complement the sonsor alarm system. Its volume is comparable to that of a fire alarm and quickly becomes very unpleasant, especially indoors. Avoid prolonged exposure to avoid risking hearing damage.
[An alert to the outside is provided by the sonsor app and, depending on structural conditions, cannot always be ensured by the sonsor siren.]
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